package com.tianjs.http;

import java.io.IOException;
import java.net.URISyntaxException;
import java.nio.charset.Charset;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.utils.URIBuilder;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class HttpExcuteService {
	
	@Autowired
	private CloseableHttpClient httpClient;
	
	@Autowired  
    private RequestConfig requestConfig;  

	/**
	 * 无参get请求
	 * @param url
	 * @return
	 * @throws IOException
	 */
	public String doGet(String url) throws IOException{
		//创建httpClient对象  
        CloseableHttpResponse response = null; 
        HttpGet httpGet = new HttpGet(url); 
        //设置请求参数  
        httpGet.setConfig(requestConfig); 
        try {  
            //执行请求  
            response = httpClient.execute(httpGet);  
            //判断返回状态码是否为200  
            if (response.getStatusLine().getStatusCode() == 200) {  
                return EntityUtils.toString(response.getEntity(), "UTF-8");  
            }  
        } finally {  
            if (response != null) {  
                response.close();  
            }  
        }  
		return null;
	}
	
	/**
	 * 有参get请求
	 * @param url
	 * @param paramMap
	 * @return
	 * @throws URISyntaxException
	 * @throws IOException
	 */
	public String doGet(String url, Map<String, String> paramMap) throws URISyntaxException, IOException{
		URIBuilder builder = new URIBuilder(url);
		for (String s : paramMap.keySet()) {  
            builder.addParameter(s, paramMap.get(s));  
        } 
		return doGet(builder.build().toString()); 
	}
	
	/**
	 * 无参post请求
	 * @param url
	 * @return
	 * @throws ClientProtocolException
	 * @throws IOException
	 */
	public HttpResult  doPost(String url) throws ClientProtocolException, IOException{
		return doPost(url, null);
	}
	
	/**
	 * 有参post请求
	 * @param url
	 * @param paramMap
	 * @return
	 * @throws ClientProtocolException
	 * @throws IOException
	 */
	public HttpResult doPost(String url, Map<String, String> paramMap) throws ClientProtocolException, IOException {
		HttpPost httpPost = new HttpPost(url); 
		//设置请求参数  
        httpPost.setConfig(requestConfig);
        if (paramMap != null) { 
        	List<NameValuePair> parameters = new ArrayList<NameValuePair>(); 
        	for (String s : paramMap.keySet()) {  
                parameters.add(new BasicNameValuePair(s, paramMap.get(s)));  
            }
        	//构建一个form表单式的实体  
            UrlEncodedFormEntity formEntity = new UrlEncodedFormEntity(parameters, Charset.forName("UTF-8"));  
            //将请求实体放入到httpPost中  
            httpPost.setEntity(formEntity);
        }
        //创建httpClient对象  
        CloseableHttpResponse response = null; 
        try{
        	response = httpClient.execute(httpPost);
            return new HttpResult(response.getStatusLine().getStatusCode(), EntityUtils.toString(response.getEntity()));
        }finally{
        	if (response != null) {  
                response.close();  
            }  
        }
	}
	public HttpResult doPostJson(String url, String json)throws ClientProtocolException, IOException{
		//创建POST请求
		HttpPost httpPost = new HttpPost(url); 
		//设置请求参数  
        httpPost.setConfig(requestConfig);
        if (json != null) {  
            // 构造一个请求实体  
            StringEntity stringEntity = new StringEntity(json, ContentType.APPLICATION_JSON);  
            // 将请求实体设置到httpPost对象中  
            httpPost.setEntity(stringEntity);  
        }  
        CloseableHttpResponse response = null;  
        try {  
            // 执行请求  
            response = this.httpClient.execute(httpPost);  
            return new HttpResult(response.getStatusLine().getStatusCode(),  
                    EntityUtils.toString(response.getEntity(), "UTF-8"));  
        } finally {  
            if (response != null) {  
                response.close();  
            }  
        }  
	}
}
